bonding: fix set_multicast_list locking
[linux-2.6.git] / drivers / net / bonding / bond_alb.h
1 /*
2  * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms of the GNU General Public License as published by the
6  * Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful, but
10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * for more details.
13  *
14  * You should have received a copy of the GNU General Public License along
15  * with this program; if not, write to the Free Software Foundation, Inc.,
16  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
17  *
18  * The full GNU General Public License is included in this distribution in the
19  * file called LICENSE.
20  *
21  */
22
23 #ifndef __BOND_ALB_H__
24 #define __BOND_ALB_H__
25
26 #include <linux/if_ether.h>
27
28 struct bonding;
29 struct slave;
30
31 #define BOND_ALB_INFO(bond)   ((bond)->alb_info)
32 #define SLAVE_TLB_INFO(slave) ((slave)->tlb_info)
33
34 struct tlb_client_info {
35         struct slave *tx_slave; /* A pointer to slave used for transmiting
36                                  * packets to a Client that the Hash function
37                                  * gave this entry index.
38                                  */
39         u32 tx_bytes;           /* Each Client acumulates the BytesTx that
40                                  * were tranmitted to it, and after each
41                                  * CallBack the LoadHistory is devided
42                                  * by the balance interval
43                                  */
44         u32 load_history;       /* This field contains the amount of Bytes
45                                  * that were transmitted to this client by
46                                  * the server on the previous balance
47                                  * interval in Bps.
48                                  */
49         u32 next;               /* The next Hash table entry index, assigned
50                                  * to use the same adapter for transmit.
51                                  */
52         u32 prev;               /* The previous Hash table entry index,
53                                  * assigned to use the same
54                                  */
55 };
56
57 /* -------------------------------------------------------------------------
58  * struct rlb_client_info contains all info related to a specific rx client
59  * connection. This is the Clients Hash Table entry struct
60  * -------------------------------------------------------------------------
61  */
62 struct rlb_client_info {
63         __be32 ip_src;          /* the server IP address */
64         __be32 ip_dst;          /* the client IP address */
65         u8  mac_dst[ETH_ALEN];  /* the client MAC address */
66         u32 next;               /* The next Hash table entry index */
67         u32 prev;               /* The previous Hash table entry index */
68         u8  assigned;           /* checking whether this entry is assigned */
69         u8  ntt;                /* flag - need to transmit client info */
70         struct slave *slave;    /* the slave assigned to this client */
71         u8 tag;                 /* flag - need to tag skb */
72         unsigned short vlan_id; /* VLAN tag associated with IP address */
73 };
74
75 struct tlb_slave_info {
76         u32 head;       /* Index to the head of the bi-directional clients
77                          * hash table entries list. The entries in the list
78                          * are the entries that were assigned to use this
79                          * slave for transmit.
80                          */
81         u32 load;       /* Each slave sums the loadHistory of all clients
82                          * assigned to it
83                          */
84 };
85
86 struct alb_bond_info {
87         struct timer_list       alb_timer;
88         struct tlb_client_info  *tx_hashtbl; /* Dynamically allocated */
89         spinlock_t              tx_hashtbl_lock;
90         u32                     unbalanced_load;
91         int                     tx_rebalance_counter;
92         int                     lp_counter;
93         /* -------- rlb parameters -------- */
94         int rlb_enabled;
95         struct packet_type      rlb_pkt_type;
96         struct rlb_client_info  *rx_hashtbl;    /* Receive hash table */
97         spinlock_t              rx_hashtbl_lock;
98         u32                     rx_hashtbl_head;
99         u8                      rx_ntt; /* flag - need to transmit
100                                          * to all rx clients
101                                          */
102         struct slave            *next_rx_slave;/* next slave to be assigned
103                                                 * to a new rx client for
104                                                 */
105         u32                     rlb_interval_counter;
106         u8                      primary_is_promisc;        /* boolean */
107         u32                     rlb_promisc_timeout_counter;/* counts primary
108                                                              * promiscuity time
109                                                              */
110         u32                     rlb_update_delay_counter;
111         u32                     rlb_update_retry_counter;/* counter of retries
112                                                           * of client update
113                                                           */
114         u8                      rlb_rebalance;  /* flag - indicates that the
115                                                  * rx traffic should be
116                                                  * rebalanced
117                                                  */
118         struct vlan_entry       *current_alb_vlan;
119 };
120
121 int bond_alb_initialize(struct bonding *bond, int rlb_enabled);
122 void bond_alb_deinitialize(struct bonding *bond);
123 int bond_alb_init_slave(struct bonding *bond, struct slave *slave);
124 void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave);
125 void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link);
126 void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave);
127 int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
128 void bond_alb_monitor(struct work_struct *);
129 int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr);
130 void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id);
131 #endif /* __BOND_ALB_H__ */
132